Finding the Fourth Proportional to 118,200.28, 163,101.72 and 72,283

Step by Step Solution

1. Step 1: Write the proportion equation
   118,200.28 : 163,101.72 = 72,283 : x
2. Step 2: Convert to fraction form
   118,200.28/163,101.72 = 72,283/x
3. Step 3: Cross multiply
   118,200.28x = 163,101.72 × 72,283
4. Step 4: Simplify right side
   118,200.28x = 11,789,481,626.76
5. Step 5: Solve for x
   x = 11,789,481,626.76/118,200.28
6. Step 6: Final answer
   x = 99,741.57